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HiRISE DTMs as bias-corrected Cloud-Optimized GeoTIFFs
One folder per HiRISE DTM product (DTEEC_*), each containing:
<product>_h.tif: height in metres (float32, NaN = nodata), COG with overviews, LERC_ZSTD compressed with a hard per-pixel error bound of 0.02 m. Heights are the source DTM minus a smooth low-frequency bias (Gaussian-smoothed difference to the HRSC/MOLA blended DEM, sigma 2.0 km), so tiles line up with the global baseline. Datum: MOLA areoid.<product>_w.tif: uint8 blending weight on a coarse grid (0 at the DTM edge, ramping to 255 at 400 m inside), for feathered mosaicking.<product>_meta.json: CRS, bounds, pixel size, bias statistics and processing parameters.
Sources
- HiRISE DTMs: NASA/JPL, University of Arizona, via the PDS Geosciences Node / Mars Orbital Data Explorer.
- Baseline for bias correction: USGS Mars HRSC/MOLA Blended DEM Global 200 m v2.
Check the source providers' terms before reuse and set the dataset license accordingly.
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